Monitoring Contaminants

Results of Monitoring for Regulated Contaminants
To ensure the safety of your drinking water, the Maui Department of Water Supply routinely monitors for contaminants in your drinking water according to Federal and State Laws, rules, and regulations. The following is a list of contaminants that were tested.

Inorganic Contaminants

Asbestos - MCL = 7 MFL

Major sources: decay of asbestos cement water mains, erosion of natural deposits

Chromium - MCL = 100 ppb

Major sources: discharge from steel and pulp mills, erosion of natural deposits

Microbiological Contaminants
Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentially harmful bacteria may be present. If coliforms are found in samples, this could signal a warning of potential problems. Chlorine levels would be raised and extensive bacteriological testing conducted to monitor the systems.